Support for windows 8 and WDK in PowerDbg

In windows 8 debugging tools for windows comes in a new form called WDK.

The home directory of the good old tools is now : C:\Program Files (x86)\Windows Kits\8.0\Debuggers\x64 (for the 64 bit version) and C:\Program Files (x86)\Windows Kits\8.0\Debuggers\x86 (for the 32 bit version)Unfortunately the PowerDbg module
does not know that.

When loading the module it looks for the home directory of "debugging tools for windows" and put it in a global variable. ($debuggerRoot)

We have to change the module file and add the correct directories.

So open the module file (PowerDbg.psm1) and change the function Get-DbgToolsLocation (line 428) so serach path will include the correct folders:

As we can see from the code PowerDbg works with only one version at a time. (The first folder in the list)
To switch between x64 and x86 we have to change the order of the folder in the list. I think that a parameter should control that. (TBD)